CONTENT & PUBLISHING · THE YELL SOCIAL GLOSSARY
Alt text.
A text alternative that communicates the purpose or essential information of an image. Screen readers can use it to make visual content understandable to people who cannot see the image.
A simple example
For a chart, the description explains the trend and important values instead of simply saying “chart.”
Put it into practice
Describe what matters in context. Avoid filling image descriptions with unrelated keywords.
Further reading: W3C: text alternatives for images
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